SEDELU
A, calcined gypsum powder process introduction
Gypsum calcinator.In the light of the features of the plaster, my company's workers after a lot of research, test, development of science and technology, the original drying, calcining two-step process improvement for one-step process.In "furnace" a device to finish four procedures: 1. Break up.2. Dry.3. The grading.4. Calcination.First from surface water, then out part of the building gypsum crystallization water.
Advantages of sderot furnace is according to the drying machine in the production process and calcination furnace respectively with the process of integration into a calcination furnace, such not only can obtain a high performance half water gypsum;And reduce the investment cost of the equipment.
Process is: gypsum by feeder into which has the function of dry, scattered, grading, calcination, the calcine furnace, high temperature hot air into the furnace at the same time for gas-solid mixture, rapid heat transfer and mass transfer rotating suspension movement, after a few seconds the calcining break down to form beta type building gypsum.Gas-solid separation by two times, to get the product.
Second, the dry - calcining process characteristics
After calcined gypsum powder test results:
1, the flexural strength: > 3 mp
2, compressive strength: > 5 mpa
3, the initial setting time: 3 ~ 6 minutes
4, final set time: 7 ~ 9 minutes
5, crushing, drying, calcination, classification in a calcination furnace.The whole process of several seconds to complete.
Third, principle and characteristics of calcining equipment
【 sderot furnace 】 : domestic r&d by airflow is calcined device.Shape for the vertical cylinder, connected with a vertical shaft of break up and the motor, at the bottom of the internal flow accelerators, produce rotary motion, a feeding in the side of the part, lower part of the other side into the air, at the top of the discharge to the trap for gas-solid separation, conveying to the storage warehouse.
The basic principle is:
Gypsum wet material powder and high temperature heat flow from sderot disperse blades at the bottom of the furnace rapid mixed with a certain air flow, the ratio of solid, gas inside the furnace body axial rotation, make the material and heat carrier rapid heat transfer, achieve the goal of decomposition dihydrate gypsum dehydration, cooked in this way can also be said rapid calcination.
The flash burn characteristics 】 :
1. Continuous operation, fast heat exchange, no aggregate phenomenon, gypsum particles suspension calcining fully, from feed to discharge only a few seconds.
"DE furnace" is our company combined with the advantages of the above equipment newly developed gypsum dynamic calcination furnace.It has scattered, classification, function of drying, calcination, fast airflow calcining equipment for integrated.
2. The uniform rapid emergence of surface water and water of crystallization is an important condition to increase the strength of gypsum.Furnace ", "Howard meet quickly and evenly dehydration, calcination furnace without aggregate phenomenon, therefore, Howard is better than that of rotary kiln furnace, fluidized calcination method.
3. The dihydrate gypsum powder "was in calcination furnace" rapid crystallization water off so gypsum powder particles have burst process, after calcined gypsum powder particle size bandwidth is better than that of fluidized bed, the rotary kiln.The flexural strength is higher than other calcination furnace.


Fourth, the user
1. Beijing xingda using desulfurization gypsum yearly produces 50000 tons of building gypsum
2. Zhanjiang phosphate fertilizer plant by using phosphorus gypsum yearly produces 200000 tons of cement retarder
3. Wenzhou first gypsum co., LTD., with annual capacity of 15 square gypsum block
4. Wuhan yangluo power plant
5. Inner Mongolia zhuo mountains gypsum factory
6. Chifeng in Inner Mongolia chemical fertilizer plant
7. Shijiazhuang sea and building materials co., LTD
8. Anhui lujiang county jin dragon environmental protection building materials co., LTD
9. Yunnan yun has held high
10. Yunnan xuanwei red xin company
11. Wu Hanqing jiang chemical co., LTD